Compression Performance with Low Key Selectivity
[read this post on Mr. Fox SQL blog] When it comes to enabling data compression in SQL Server I suspect most people don’t do a lot of testing as to the impacts of...
2016-03-15
11 reads
Mr. Fox SQL
SQL Filegroup/File Proportional Fill Algorithm
[read this post on Mr. Fox SQL blog]
I had a question at work recently where there was some confusion around how SQL...
2016-03-02 (first published: 2016-02-24)
2,682 reads
SQL Filegroup/File Proportional Fill Algorithm
[read this post on Mr. Fox SQL blog] I had a question at work recently where there was some confusion around how SQL Server allocates data across data files within a filegroup...
2016-02-24
12 reads
SQL Saturday Melbourne (#464) – 20 Feb 2016
For those not aware SQL Saturday is coming to Melbourne on Sat 20 Feb 2016.
SQL Saturday is an excellent free learning...
2016-01-18
692 reads
SQL Saturday Melbourne (#464) – 20 Feb 2016
For those not aware SQL Saturday is coming to Melbourne on Sat 20 Feb 2016. SQL Saturday is an excellent free learning resource for all things SQL Server – all costs are...
2016-01-18
8 reads
A “Business Intelligence” (BI) Definition
[read this post on Mr. Fox SQL blog]
Over the years I have presented many times to various clients describing Business Intelligence (BI) solutions...
2016-01-19 (first published: 2016-01-11)
2,778 reads
A “Business Intelligence” (BI) Definition
[read this post on Mr. Fox SQL blog] Over the years I have presented many times to various clients describing Business Intelligence (BI) solutions using the Microsoft BI solutions stack. In all of...
2016-01-11
16 reads
Calculating Table Partition Sizes in Advance
[read this post on Mr. Fox SQL blog]
Continuing on with my Partitioning post series, this is part 7.
The partitioning includes several major...
2015-11-30 (first published: 2015-11-23)
1,493 reads
Calculating Table Partition Sizes in Advance
[read this post on Mr. Fox SQL blog] Continuing on with my Partitioning post series, this is part 7. The partitioning includes several major components of work (and can be linked...
2015-11-23
7 reads
Implementing Partition Aware Index Optimisation Procedures
[read this post on Mr. Fox SQL blog]
Continuing on with my Partitioning post series, this is part 6.
The partitioning includes several major...
2015-11-09
1,187 reads
Blogs
Automatic Index Compaction
By ReviewMyDB
Index maintenance has always meant nightly jobs and a window you have to defend....
The Goldilocks problem – Materialized Views
I’m sure you’ve all heard the tale of Goldilocks and the Three Bears, but...
Monday Monitor Tips: Virtual Machine Usage and Cost
By Steve Jones
One of the things I’ve been requesting for a number of years is cost...
Forums
SQL Art, Part 4: Happy 4th of July — A British DBA's Guide to Celebrating a War We Don't Talk About
Comments posted to this topic are about the item SQL Art, Part 4: Happy...
How We Handled a Vendor Retry That Loaded Twice in Snowflake
Comments posted to this topic are about the item How We Handled a Vendor...
Cognitive Coverage
Comments posted to this topic are about the item Cognitive Coverage
Question of the Day
Getting the Average
I have this data in the dbo.Commission table in a SQL Server 2022 database.
salesperson commission Brian 12 Brian 16 Andy 7 Andy 14 Andy 21 Steve 20 Steve NULLAll the data is a varchar, and I decide to run this query to get the totals for each salesperson.
SELECT SalesPerson
, AVG(TRY_PARSE(Commission AS int)) AS TotalCommission
FROM commission
GROUP BY SalesPerson
GO
What average commission is calculated for Steve? See possible answers